Standard Ignition RY-117 HVAC Automatic Temperature Control (ATC) Relay

HVAC Automatic Temperature Control Relay

Standard Ignition RY-117 is an HVAC automatic temperature control relay built for vehicles that need dependable blower and climate-control switching. It uses a 12-volt, 30-amp design with a rectangular female connector and 5 blade terminals for the specified applications.

Compatible With Chevrolet, GMC, Pontiac, Buick, Oldsmobile, and related GM platforms across 1977-1994 model years, this relay is a direct-fit service part for many manual A/C and high blower applications. The RY-117 part number is also referenced in OE and aftermarket cross listings for the same use cases.

Key Features

• 12-volt HVAC relay with 30 A amperage rating
• Female rectangular connector with 1 connector cavity
• 5 male blade terminals for the specified vehicle applications
• Mounting bracket(s) included for installation support
• Composite housing built for harsh under-hood temperatures
• Brass or copper contacts used where specified for wear resistance
• Manufactured under TS16949 and ISO9001 certified processes

Detailed Description

Standard Ignition RY-117 is an HVAC Automatic Temperature Control (ATC) relay used in GM climate-control and blower circuits. It is listed for a wide range of Chevrolet and GMC trucks, vans, SUVs, and passenger cars, including Chevrolet S10, Chevrolet Blazer, GMC Jimmy, and GMC Sonoma applications, along with many C/K-series and G-series vehicles. The relay construction focuses on stable electrical switching and durability in demanding engine-compartment conditions.

This part cross-references Four Seasons 83306 and Gates 19952 for the same application. If you are servicing a Chevrolet S10, GMC Jimmy, or another listed GM vehicle with automatic air conditioning, manual A/C, or high blower operation, RY-117 provides the specified relay configuration and terminal layout.

Common Problems This Relay Can Address

• Blower motor not switching to the correct speed
• Intermittent HVAC relay operation
• Loss of automatic temperature control function
• Electrical relay failure from heat and vibration exposure
• Climate-control circuit issues on listed GM vehicles

Installation Notes and Tips

Verify connector style, terminal count, and mounting location before installation. Confirm the vehicle’s HVAC system type, since fitment includes manual A/C, automatic air conditioning, and high blower configurations depending on year and model. Match the existing relay to the 5-terminal blade layout and review any fitment notes for metal housing or high blower applications.

For best results, inspect the relay connector for heat damage, corrosion, or loose terminals before installing the new part. Standard Ignition RY-117 is a direct replacement for the listed applications, but the vehicle’s wiring and control circuit should also be checked if the original relay failed repeatedly.

Quality Assurance

Standard Ignition manufactures this relay under stringent quality requirements in TS16949- and ISO9001-certified plants. The brand states that it maintains quality control from component selection through finished product assembly to help ensure the correct part is supplied for the specified vehicle application.